SPRAYING CROPS 293 



keep it in suspension, for unless the liquid is constantly stirred the powder 

 settles to the bottom of the vessel, consequently the mixture becomes of unequal 

 strength, and is liable to injure the foliage. An improved (more finely ground) 

 Paris green is now offered, and is a much superior and safer article. We have 

 also used London purple, a similar compound to the above, colour excepted, 

 and we have tried many of the newer forms of insecticides, but they are much 

 too expensive for large growers. On the other hand, they are generally useful 

 and effective. For the amateur and small cultivator, especially good and 

 convenient is extract of quassia now cheaply offered by dealers. 



As a fungicide and remedy for mildew, we have found nothing better than 

 sulphur in some form, such as sulphide of potassium, or liver of sulphur, but the 

 Bordeaux mixture is excellent for spraying potatoes, or other ground crops. It 

 is hoped that at least some of the restrictions imposed upon the sale of these 

 widely used poisonous compounds will shortly be removed, so as to enable fruit- 

 growers to combat successfully against destructive insects and diseases. 



